Include "subtract" icon in icon list (#445)

For lists where we use the "add" icon on the button for adding new elements, we
want to use the "subtract" icon for removing elements.

Author: sgrimm

assets/icon-subtract.svg

@@ -63,6 +63,7 @@ import IconNursery from '../../svg/IconNursery';
 import IconParchment from '../../svg/IconParchment';
 import IconRestorationSite from '../../svg/IconRestorationSite';
 import IconSeedling from '../../svg/IconSeedling';
+import IconSubtract from '../../svg/IconSubtract';
 import IconSynced from '../../svg/IconSynced';
 import IconTrashCan from '../../svg/IconTrashCan';
 import IconTreasureMap from '../../svg/IconTreasureMap';
@@ -162,6 +163,7 @@ export type IconName =
   | 'iconParchment'
   | 'iconRestorationSite'
   | 'iconSeedling'
+  | 'iconSubtract'
   | 'iconSynced'
   | 'iconTrashCan'
   | 'iconTreasureMap'
@@ -265,6 +267,7 @@ const icons: Record<IconName, SVGComponent> = {
   iconParchment: IconParchment,
   iconRestorationSite: IconRestorationSite,
   iconSeedling: IconSeedling,
+  iconSubtract: IconSubtract,
   iconSynced: IconSynced,
   iconTrashCan: IconTrashCan,
   iconTreasureMap: IconTreasureMap,

src/components/Icon/icons/index.tsx

@@ -0,0 +1,16 @@
+import * as React from 'react';
+import { SVGProps } from 'react';
+interface SVGRProps {
+  title?: string;
+  titleId?: string;
+}
+const SvgIconSubtract = ({ title, titleId, ...props }: SVGProps<SVGSVGElement> & SVGRProps) => (
+  <svg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' aria-labelledby={titleId} {...props}>
+    {title ? <title id={titleId}>{title}</title> : null}
+    <path
+      fill='#333025'
+      d='M12 2C6.486 2 2 6.486 2 12s4.486 10 10 10 10-4.486 10-10S17.514 2 12 2Zm0 1.5c4.703 0 8.5 3.797 8.5 8.5 0 4.703-3.797 8.5-8.5 8.5A8.489 8.489 0 0 1 3.5 12c0-4.703 3.797-8.5 8.5-8.5Zm-4.25 7.75a.751.751 0 1 0 0 1.5h8.5a.751.751 0 1 0 0-1.5h-8.5Z'
+    />
+  </svg>
+);
+export default SvgIconSubtract;

src/components/svg/IconSubtract.tsx

@@ -69,6 +69,7 @@ export { default as IconParchment } from './IconParchment';
 export { default as IconRestorationSite } from './IconRestorationSite';
 export { default as IconSeedBank } from './IconSeedBank';
 export { default as IconSeedling } from './IconSeedling';
+export { default as IconSubtract } from './IconSubtract';
 export { default as IconSynced } from './IconSynced';
 export { default as IconTrashCan } from './IconTrashCan';
 export { default as IconTreasureMap } from './IconTreasureMap';